..so anyway and a few years later.
Fixed my old tablet. Didn't do well with the latest Android (random update).
The Lenovo banner was flashing and vibrating.
Got a penguin too..
.......
Required,
1 x Paper Clip
An optimistic outlook.
Unplug the nasty %$÷= from the power.
Then press [power+up/down] same time as inserting the opened paper into its hole..all simultaneously.
Boot started 👍